*{
    margin: 0;
    padding: 0;
}

ul{
    list-style: none;
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    height: 50px;
    line-height: 50px;
    width: 100%;
    background-color: white;
    border-top: 1px solid #c9c9c9;;
}

ul li{
    flex: 1;
    text-align: center;
}

.active{
    color: orangered;
}

.inp-back{
    width: 100%;
    height: 25px;
    position: fixed;
    top: 22px;
    left: 0;
    background-color: white;
}

input{
    width: 95%;
    height: 22px;
    line-height: 22px;
    font-size: 16px;
    margin-top: 2px;
    padding: 0 5px;
    border: 1px solid grey;
    position: fixed;
    top: 22px;
    left: 50%;
    transform: translateX(-50%);
}


.list{
    margin-top: 25px;
}

dl{
    padding: 10px 5px;
    border-bottom: 1px solid #c9c9c9;
}

dl dt{
    font-size: 18px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

dl dd{
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

button{
    border: 1px solid grey;
}

.nav-box{
    background-color: skyblue;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.left{
    position: absolute;
    left:0;
}

.right{
    position: absolute;
    right:0;
}